CN216322910U - Battery pole piece coating device - Google Patents
Battery pole piece coating device Download PDFInfo
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- CN216322910U CN216322910U CN202120929646.3U CN202120929646U CN216322910U CN 216322910 U CN216322910 U CN 216322910U CN 202120929646 U CN202120929646 U CN 202120929646U CN 216322910 U CN216322910 U CN 216322910U
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Abstract
The utility model relates to the field of battery pole piece coating equipment, and discloses a battery pole piece coating device which comprises a rack and a coating head arranged on the rack, wherein the coating head comprises a metering roller, an adhesive roller and a coating roller, the metering roller, the adhesive roller and the coating roller are respectively driven by a rotary driving part, a certain gap is arranged between the working surfaces of the metering roller and the adhesive roller, a certain gap is arranged between the working surfaces of the adhesive roller and the coating roller, the metering roller, the adhesive roller and the coating roller are all connected with the rack through a coating pressure regulating device, the working surface of the coating roller is in contact with the surface of a pole piece base belt, when the coating roller rotates, the slurry is uniformly coated on the surface of the pole piece base belt, the slurry cannot generate fog and splash in the coating process, the slurry utilization rate is high, the slurry coating speed is high, and the coating pressure regulating device can regulate the coating pressure in real time so as to control the coating thickness in real time, the coating thickness has good stability and high precision.
Description
Technical Field
The utility model relates to the technical field of battery pole piece coating equipment, in particular to a battery pole piece coating device.
Background
The production of the lithium battery comprises a pole piece manufacturing process, a battery assembly process and a final liquid injection, pre-charging, formation and aging process. In the stage of pole piece manufacturing process, the processes of slurry preparation, slurry coating, pole piece rolling, pole piece drying and the like can be subdivided. The slurry coating is the next procedure after the slurry preparation is finished, and the procedure is mainly used for uniformly coating the slurry with good stability, good viscosity and good fluidity on the positive and negative current collectors. The pole piece coating has important influence on the capacity of the finished battery, the safety of the battery, the consistency of the performance of the battery and the service life of the battery.
The coating that the thick liquids was carried out to the tradition generally adopts the coating roller to rotate and drives the thick liquids and coat to the substrate, and reuse scraper strikes off unnecessary thick liquids, but this kind of method precision is not high, and the coating is not enough even, leads to the pole piece quality of production not good easily, and changes when thick liquid viscosity, can not the accurate control coating thickness, to the great or less coating of viscosity, can't guarantee to obtain the even thick coating of thickness, is difficult to realize the accurate control to the coating thickness.
The utility model discloses a utility model patent that grant publication number is CN 207271543U discloses a battery pole piece coating drying device, and the device is scribbled the leftover of bolt of cloth through first scribbles leftover of bolt of cloth and second and is realized two-sided coating, but the thick liquids supply in first scribbling leftover of cloth and the second scribbles the leftover of bolt of cloth is realized by the power pump, and the actual discharge capacity of power pump is related to a great deal of factor, consequently can't accurate control scribble the spraying volume of leftover of cloth to in the coating process, the thick liquids splashes that fog easily, causes extravagantly, the polluted environment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a battery pole piece coating device which has the advantages of high coating speed, high production efficiency, more uniform coating thickness, good appearance quality, accurate coating thickness control and the like.
The technical purpose of the utility model is realized by the following technical scheme:
the utility model provides a battery pole piece coating device, includes the frame and sets up the head of scribbling in the frame, it includes metering roll, glues material roller and coating roller to scribble the head, metering roll, gluing material roller and coating roller are driven by rotation driving portion respectively, be equipped with certain clearance between the working surface of metering roll and gluing material roller, be equipped with certain clearance between the working surface of gluing material roller and coating roller, metering roll, gluing material roller and coating roller all are connected with the frame through coating pressure adjusting device, the surface contact of the working surface of coating roller and pole piece baseband.
Through adopting above-mentioned technical scheme, be stained with thick liquids and attach at the sizing roller working surface when the rotation of rotation drive portion drive sizing roller, along with the continuous rotation of commentaries on classics material roller, be stained with the thick liquids that attaches on sizing roller surface and move to in the clearance of sizing roller and coating roller and along with the rotation of coating roller gradually shift to the working surface of the coating roller relative with the sizing roller rotation direction, because the working surface of coating roller and the surface contact of pole piece baseband, consequently the coating roller is when rotating the thick liquids of coating roller working surface by even coating on the surface of pole piece baseband, the thick liquids can not produce the fog and splash in the coating process, thick liquids utilization ratio is high, and thick liquids coated fast, high in production efficiency.
The utility model is further provided with: the coating pressure adjusting device comprises a fixed slide way, a slide block in sliding fit with the fixed slide way and a linear driving part for driving the slide block to reciprocate along the fixed slide way, the fixed slide way and the linear driving part are fixedly connected with the rack, and the metering roller, the adhesive roller and the coating roller are fixed on the slide block through the bearing seat.
Through adopting above-mentioned technical scheme, because hydraulic servo drive arrangement's pressure, speed, position are full closed loop digital control, degree of automation is high, and the precision is good, and its pressure, speed programmable control satisfy various technology needs, can also realize long-range automatic control, therefore the servo pneumatic cylinder of sharp drive portion preferred, servo pneumatic cylinder drive slider is along fixed slide reciprocating motion, mainly is equipped with three work position on the fixed slide: coating position: the working surface of the coating roller is ensured to be contacted with the surface of the pole piece base belt, and slurry coating is realized; the middle position: the working surface of the coating roller is separated from the surface of the pole piece base band by a certain distance, so that the coating roller is convenient to clean or cannot touch the pole piece base band during manual adjustment; a rear position: the working surface of the coating roller and the surface of the pole piece baseband are separated by a large distance, and enough space is reserved for roller replacement or maintenance, in addition, the servo hydraulic cylinder is utilized to drive the slide block, the pressure between the working surface of the coating roller and the surface of the pole piece baseband can be adjusted in real time, so that the uniformity of the coating thickness on the pole piece baseband is ensured, the metering roller, the adhesive roller, the coating roller and the slide block form an integral structure, when the pressure between the working surface of the coating roller and the surface of the pole piece baseband is adjusted in real time through the servo hydraulic cylinder, the rollers simultaneously move along with the slide block, the phenomenon that mutual interference is generated by vibration between the rollers during respective adjustment is avoided, and the precision and the stability of the coating thickness can be effectively improved.
The utility model is further provided with: and a gap adjusting device is arranged on the bearing seat.
By adopting the technical scheme, the gap adjusting device is generally a manual adjusting mechanism and is used for adjusting the gap between the metering roller and the working surface of the adhesive roller and the gap between the metering roller and the working surface of the adhesive roller, the amount of slurry adhered to the adhesive roller can be effectively controlled by adjusting the gap between the metering roller and the working surface of the adhesive roller, so that the effect of assisting in adjusting the thickness of the coating layer is realized, the amount of slurry adhered to the coating roller can be effectively controlled by adjusting the gap between the working surface of the adhesive roller and the working surface of the coating roller, the effect of assisting in adjusting the thickness of the coating layer is further realized, the pressure between the working surface of the coating roller and the surface of the pole piece base band can be effectively controlled by adjusting the gap between the working surface of the coating roller and the surface of the pole piece base band, and the adjustment of the thickness of the coating layer on the pole piece base band is further realized.
The utility model is further provided with: and a slurry tank for providing slurry for the bonding roller is arranged below the bonding roller, and the lower edge of the bonding roller is immersed in the slurry tank.
Through adopting above-mentioned technical scheme, the thick liquids groove is used for holding thick liquids and drives thick liquids at the rotatory in-process of sizing roller, makes thick liquids attach to the working surface of sizing roller, and simultaneously, the thick liquids groove can also collect the unnecessary thick liquids of drippage on each roller, reduces extravagantly.
The utility model is further provided with: the pole piece base band support device is characterized by further comprising a support roller for supporting the pole piece base band, wherein the support roller is installed on the rack.
By adopting the technical scheme, the supporting roll is used for supporting the pole piece base band, and the working surfaces of the pole piece base band and the coating roll are ensured to keep certain contact pressure, so that the slurry can be uniformly coated on the surface of the pole piece base band.
The utility model is further provided with: a pressure detection unit for detecting the current coating pressure is arranged below the material sticking roller bearing seat, and the pressure sensor is fixed on the sliding block.
By adopting the technical scheme, certain contact pressure exists between the working surfaces of the pole piece base band and the coating roller, the metering roller, the adhesive roller and the coating roller are fixed on the sliding block, the metering roller, the adhesive roller and the coating roller form a whole with the sliding block, the working pressure between the working surface of the coating roller and the pole piece base band can be transmitted to the pressure detection unit below through the bearing seat of the adhesive roller, the pressure detection unit detects the coating pressure in real time, the coating pressure is compared with the set coating target pressure, and then the actual working position of the servo hydraulic cylinder is obtained through a pressure control algorithm.
The utility model is further provided with: the coating heads are divided into two groups, namely an upper coating head and a lower coating head, the upper coating head and the lower coating head are opposite to two surfaces of the pole piece base band respectively, the upper coating head and the lower coating head are identical in structure, and the working surfaces of the coating rollers in the upper coating head and the lower coating head are in contact with two surfaces of the pole piece base band respectively.
By adopting the technical scheme, the upper coating head and the lower coating head can simultaneously coat the upper surface and the lower surface of the pole piece baseband, so that the production efficiency is improved on the one hand, and the upper surface and the lower surface of the pole piece baseband are simultaneously coated on the other hand, so that the two sides of the pole piece baseband are uniformly stressed, the pole piece baseband cannot deform under the pressure action of the coating rollers on the two sides, and the appearance quality of a product is better.
The utility model has the beneficial effects that:
1. according to the utility model, the working surface of the coating roller is contacted with the surface of the pole piece base band, so that the slurry on the working surface of the coating roller is uniformly coated on the surface of the pole piece base band when the coating roller rotates, the coating roller is good in adaptability, low-viscosity and high-viscosity slurry is suitable, the slurry cannot generate fog and splash in the coating process, the utilization rate of the slurry is high, the slurry coating speed is high, and the production efficiency is high.
2. The utility model adjusts the pressure between the working surface of the coating roller and the surface of the pole piece base band in real time through the servo hydraulic cylinder, thereby controlling the coating thickness in real time, and in addition, each roller moves along with the slide block simultaneously, thereby avoiding the phenomenon of mutual interference caused by vibration between the rollers when adjusting respectively, effectively improving the precision and stability of the coating thickness, and ensuring that the coating thickness is more uniform.
3. According to the utility model, the upper surface and the lower surface of the pole piece baseband are coated simultaneously by the upper coating head and the lower coating head, and when the upper surface and the lower surface of the pole piece baseband are coated simultaneously by the upper coating head and the lower coating head, on one hand, the production efficiency is improved, and on the other hand, the two sides of the pole piece baseband are uniformly stressed, so that the pole piece baseband cannot deform under the pressure action of the coating rollers at the two sides, and the appearance quality of a product is better.
4. According to the utility model, the gap adjusting devices are arranged on the bearing seats of the metering roller, the adhesive roller and the coating roller to manually adjust the gaps among the metering roller, the adhesive roller and the working surface of the coating roller, so that the amount of slurry adhered to the adhesive roller and the amount of slurry adhered to the coating roller are effectively controlled, the effect of auxiliary adjustment of the thickness of the coating layer is realized, the pressure between the working surface of the coating roller and the surface of the pole piece base band can be effectively controlled by adjusting the gap between the working surface of the coating roller and the surface of the pole piece base band, the adjustment of the thickness of the coating layer on the pole piece base band can be realized, and the more accurate control of the thickness of the coating layer is realized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of a battery pole piece coating device of the present invention.
FIG. 2 is a front view of a battery pole piece coating apparatus of the present invention.
In the figure, 1, a frame; 2. coating a head; 21. a metering roll; 22. a material sticking roller; 23. a coating roller; 24. a rotation driving section; 25. a coating pressure adjusting device; 251. fixing the slideway; 252. a slider; 253. a linear driving section; 26. a bearing seat; 27. a gap adjusting device; 28. a slurry tank; 29. a pressure detection unit; 3. a pole piece baseband; 4. a support roller; 201. coating a head; 202. and a lower coating head.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. It is to be understood that the described embodiments are merely a few embodiments of the utility model, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
Referring to fig. 1 and 2, a battery pole piece coating device, includes frame 1 and the head 2 of scribbling of setting on frame 1, it has two sets ofly to scribble the head 2, scribble the head 201 and scribble the head 202 respectively on being, it is relative with two surfaces of pole piece baseband 3 respectively to scribble the head 201 and scribble the head 202 down, and it can scribble the upper and lower two surfaces of pole piece baseband 3 simultaneously to scribble the head 201 and scribble the head 202 down, has improved production efficiency on the one hand, and on the other hand coats simultaneously from upper and lower two surfaces for the even atress in both sides of pole piece baseband 3, therefore pole piece baseband 3 can not produce the deformation in the coating process, and the appearance quality of product is better.
Specifically, the upper coating head 201 and the lower coating head 202 have the same structure, working surfaces of coating rollers 23 in the upper coating head 201 and the lower coating head 202 are respectively contacted with two surfaces of a pole piece base belt 3, two coating rollers 23 coat slurry on the two surfaces of the pole piece base belt 3 when rotating, the upper coating head 201 and the lower coating head 202 respectively comprise a metering roller 21, a bonding roller 22 and a coating roller 23, the metering roller 21, the bonding roller 22 and the coating roller 23 are respectively driven by a rotary driving part 24, the metering roller 21, the bonding roller 22 and the coating roller 23 can rotate in the same direction or opposite directions, a certain gap is arranged between the metering roller 21 and the working surfaces of the bonding roller 22, a certain gap is arranged between the bonding roller 22 and the working surfaces of the coating rollers 23, both the gap between the metering roller 21 and the working surfaces of the bonding roller 22 and the gap between the bonding roller 22 and the working surfaces of the coating rollers 23 can be adjusted, in addition, the metering roller 21, the sizing roller 22 and the coating roller 23 are all connected with the frame 1 through a coating pressure adjusting device 25, the working surface of the coating roller 23 is in contact with the surface of the pole piece base band 3, and the contact pressure between the working surface of the coating roller 23 and the surface of the pole piece base band 3 can be adjusted through the coating pressure adjusting device 25.
Specifically, the coating pressure adjusting device 25 includes a fixed slide way 251, a slide block 252 in sliding fit with the fixed slide way 251, and a linear driving part 253 for driving the slide block 252 to reciprocate along the fixed slide way, the fixed slide way 251 and the linear driving part 253 are both fixedly connected with the frame 1, the metering roller 21, the sizing roller 22, and the coating roller 23 are sequentially fixed on the slide block 252 through a bearing seat 26, and the slide block 252 is driven by the linear driving part 253 to reciprocate along the fixed slide way 251, so that the contact pressure between the working surface of the coating roller 23 fixed on the slide block 252 and the surface of the pole piece base belt 3 is increased or decreased, thereby realizing the adjustment of the coating thickness, and because the pressure, the speed, and the position of the hydraulic servo driving device are fully closed-loop digital control, the automation degree is high, the precision is good, the pressure and the speed can be controlled in a programmable manner, various process requirements can be met, and remote automatic control can also be realized, therefore, the linear driving part 253 is preferably a servo hydraulic cylinder, the servo hydraulic cylinder drives the slide block 252 to reciprocate along the fixed slide way 251 to adjust the pressure between the working surface of the coating roller 23 and the surface of the pole piece base band 3 in real time, so as to ensure the uniformity of the coating thickness on the pole piece base band 3, at this time, the metering roller 21, the sizing roller 22, the coating roller 23 and the slide block 252 form an integral structure, when the pressure between the working surface of the coating roller 23 and the surface of the pole piece base band 3 is adjusted in real time through the servo hydraulic cylinder, the rollers simultaneously move along with the slide block 252, the phenomenon that mutual interference is generated by vibration between the rollers during respective adjustment is avoided, the precision and the stability of the coating thickness can be effectively improved, and simultaneously, in order to clean and maintain the equipment, three working positions can be arranged on the fixed slide way 251: coating position: the working surface of the coating roller 23 is ensured to be contacted with the surface of the pole piece base band 3, so that slurry coating is realized; the middle position: the working surface of the coating roller 23 is separated from the surface of the pole piece base band 3 by a certain distance, so that the pole piece base band 3 is not touched when the coating roller is cleaned or manually adjusted; a rear position: the working surface of the coating roller 23 is separated from the surface of the pole piece base band 3 by a large distance, and enough space is reserved for roller replacement or maintenance.
Further, the bearing seat 26 is provided with a gap adjusting device 27, the gap adjusting device 27 is generally a manual adjusting mechanism, such as a screw elevator, the height of the roller is changed by rotating the handle of the screw elevator, so as to adjust the gap between the working surfaces of the metering roller 21, the adhesive roller 22 and the coating roller 23, the amount of the slurry adhered to the adhesive roller 22 can be effectively controlled by adjusting the gap between the working surfaces of the metering roller 21 and the adhesive roller 22, so as to achieve the effect of assisting in adjusting the thickness of the coating layer, the amount of the slurry adhered to the coating roller 23 can be effectively controlled by adjusting the gap between the working surfaces of the adhesive roller 22 and the coating roller 23, so as to further achieve the effect of assisting in adjusting the thickness of the coating layer, the pressure between the working surface of the coating roller 23 and the surface of the pole piece base band 3 can be effectively controlled by adjusting the gap between the working surface of the coating roller 23 and the surface of the pole piece base band 3, thereby further realizing the adjustment of the coating thickness on the pole piece base band.
Further, a slurry groove 28 for providing slurry for the adhesive roller 22 is arranged below the adhesive roller 22, the lower edge of the adhesive roller 22 is immersed in the slurry groove 28, the slurry groove 28 is used for accommodating the slurry and driving the slurry in the rotating process of the adhesive roller 22, so that the slurry is attached to the working surface of the adhesive roller, and meanwhile, the slurry groove 28 can also collect the redundant slurry dripped on each roller, thereby reducing waste.
Further, the pole piece base band coating device further comprises a supporting roller 4 used for supporting the pole piece base band 3, wherein the supporting roller 4 is installed on the rack 1, the supporting roller 4 is used for supporting the pole piece base band 3, and certain contact pressure is kept between the pole piece base band 3 and the working surface of the coating roller 23, so that slurry can be uniformly coated on the surface of the pole piece base band 3.
Further, a pressure detection unit 29 for detecting the current coating pressure is arranged below the bearing seat 26 of the adhesive roller 22, the pressure detection unit 29 is fixed on the slider 252, a certain contact pressure exists between the pole piece base band 3 and the working surface of the coating roller 23, the metering roller 21, the adhesive roller 22 and the coating roller 23 are all fixed on the slider 252, the metering roller 21, the adhesive roller 22, the coating roller 23 and the slider 252 form a whole, the working pressure between the working surface of the coating roller 23 and the pole piece base band 3 is transmitted to the pressure detection unit 29 below through the adhesive roller 22, the pressure detection unit 29 detects the coating pressure in real time, the coating pressure is compared with a set coating target pressure, and then the actual working position of the servo hydraulic cylinder is obtained through a pressure control algorithm.
The working principle of the utility model is as follows: during coating, the upper coating head 201 and the lower coating head 202 simultaneously coat the upper surface and the lower surface of the pole piece base band 3, the working surfaces of the coating rollers 23 in the upper coating head 201 and the lower coating head 202 are respectively contacted with the two surfaces of the pole piece base band 3, when the two coating rollers 23 rotate, the sizing agent is coated on the two surfaces of the pole piece base band 3, the amount of the sizing agent attached to the adhesive roller 22 can be effectively controlled by adjusting the gap between the metering roller 21 and the working surface of the adhesive roller 22, so that the effect of assisting in adjusting the thickness of the coating layer is realized, the amount of the sizing agent attached to the coating roller 23 can be effectively controlled by adjusting the gap between the adhesive roller 22 and the working surface of the coating roller 23, the effect of assisting in adjusting the thickness of the coating layer is further realized, the pressure between the working surface of the coating roller 23 and the surface of the pole piece base band 3 can be effectively controlled by adjusting the contact pressure between the working surface of the coating roller 23 and the surface of the pole piece base band 3, thereby further realizing the adjustment of the coating thickness on the pole piece base band.
Claims (7)
1. The utility model provides a battery pole piece coating unit, includes frame (1) and sets up scribble head (2) on frame (1), its characterized in that: scribble head (2) including metering roll (21), sizing roller (22) and coating roller (23), metering roll (21), sizing roller (22) and coating roller (23) are driven by rotation driving portion (24) respectively, be equipped with certain clearance between the working surface of metering roll (21) and sizing roller (22), be equipped with certain clearance between the working surface of sizing roller (22) and coating roller (23), metering roll (21), sizing roller (22) and coating roller (23) all are connected with frame (1) through coating pressure adjusting device (25), the surface contact of the working surface of coating roller (23) and pole piece baseband (3).
2. The battery pole piece coating device of claim 1, wherein: the coating pressure adjusting device (25) comprises a fixed slide way (251), a slide block (252) in sliding fit with the fixed slide way (251) and a linear driving part (253) for driving the slide block (252) to reciprocate along the fixed slide way (251), the fixed slide way (251) and the linear driving part (253) are fixedly connected with the rack (1), and the metering roller (21), the adhesive roller (22) and the coating roller (23) are fixed on the slide block (252) through a bearing seat (26) in sequence.
3. The battery pole piece coating device of claim 2, wherein: and a gap adjusting device (27) is arranged on the bearing seat (26).
4. The battery pole piece coating device of claim 1, wherein: a slurry groove (28) for providing slurry for the bonding roller (22) is arranged below the bonding roller (22), and the lower edge of the bonding roller (22) is immersed in the slurry groove (28).
5. The battery pole piece coating device of claim 1, wherein: the pole piece base band support device is characterized by further comprising a support roller (4) used for supporting the pole piece base band (3), wherein the support roller (4) is installed on the rack (1).
6. The battery pole piece coating device of claim 2, wherein: a pressure detection unit (29) for detecting the current coating pressure is arranged below a bearing seat (26) of the adhesive roller (22), and the pressure detection unit (29) is fixed on a sliding block (252).
7. The battery pole piece coating device of claim 1, wherein: the coating heads (2) are divided into two groups, namely an upper coating head (201) and a lower coating head (202), the upper coating head (201) and the lower coating head (202) are opposite to two surfaces of the pole piece base band (3) respectively, the upper coating head (201) and the lower coating head (202) are identical in structure, and the working surfaces of the coating rollers (23) in the upper coating head (201) and the lower coating head (202) are in contact with the two surfaces of the pole piece base band (3) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120929646.3U CN216322910U (en) | 2021-04-30 | 2021-04-30 | Battery pole piece coating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120929646.3U CN216322910U (en) | 2021-04-30 | 2021-04-30 | Battery pole piece coating device |
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| Publication Number | Publication Date |
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| CN216322910U true CN216322910U (en) | 2022-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120929646.3U Active CN216322910U (en) | 2021-04-30 | 2021-04-30 | Battery pole piece coating device |
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| CN (1) | CN216322910U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115041351A (en) * | 2022-07-25 | 2022-09-13 | 山东齐昊新型彩铝有限公司 | Color-coated aluminum coil coating equipment with scraper roller calibration function and method |
-
2021
- 2021-04-30 CN CN202120929646.3U patent/CN216322910U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115041351A (en) * | 2022-07-25 | 2022-09-13 | 山东齐昊新型彩铝有限公司 | Color-coated aluminum coil coating equipment with scraper roller calibration function and method |
| CN115041351B (en) * | 2022-07-25 | 2023-11-03 | 山东齐昊新型彩铝有限公司 | Color-coated aluminum roll coating equipment and method with scraper roll calibration function |
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